Yes, the 9V is because of the auxiliary power supply that powers everything inside. Not just the Classic of course. Lots of voltages and various

power levels required to run these things.

And charcoal inside a Classic refurb ! Hmmm... You can be sure... There WILL be spankings !

boB


On 5/30/2016 7:43 PM, Dan Fink wrote:
MPPT does need a minimum battery voltage to wake up and start charging, at least 9 volts -- I once arrived at a remote site on a sunny day, the PV input breaker had tripped, batteries were under 9v, no charging despite the sunny weather until I woke the MPPT up with jumper cables from my truck battery.

Dan Fink
Adjunct Professor of Solar Energy Technology, Ecotech Institute
IREC Certified Instructor™ for:
~ PV Installation Professional
~ Small Wind Installer
Executive Director, Buckville Energy
NABCEP Registered Continuing Education Providers™
970.672.4342 <tel:970.672.4342>


On Mon, May 30, 2016 at 5:59 PM, Aaron Mandelkorn <reoso...@gmail.com <mailto:reoso...@gmail.com>> wrote:

    Hi all. I returned to a off grid site today after having no winter
    access. It appears as though the classic 150 charge controller has
    failed. The batteries are completely discharged. The classics
    screen will flash occasionally as well as a yellow light on this
    left front of the controller but wont turn on. Does the classic
    have a minimum voltage requirement needed to turn on? Has anyone
    else experienced this?  I can't figure out what happened to cause
    this issue.

    Thanks

    Aaron Mandelkorn
    Owner/Solar Specialist
    Renewable Energy Outfitters
    www.reosolar.com <http://www.reosolar.com>
    www.offgriddepot.biz <http://www.offgriddepot.biz>
    970-596-3744 <tel:970-596-3744>
    719-221-5249 <tel:719-221-5249>
    reoso...@gmail.com <mailto:reoso...@gmail.com>


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